Bought this torch kit second hand and it advertised having reverse flow check valves. I already bought a flashback arrestor kit and was wondering if the arrestors are needed.
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noddybrian
- noddybrian
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Weldmonger
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Joined:Thu Jan 24, 2013 12:13 pm
Welcome to the forum Juliano-R.
Yes you should have both - the check valves on the torch really only prevent intermixing of gasses due to large pressure differentials & help prevent hose damage due to high pressure shocks caused by a flash back - the flash back arrestors prevent a flame traveling back up the pipe to the regulator & causing damage or even getting to cause burn back into the cylinder - the better ones will shut off the gas even after a small " pop " until reset - only after seeing a cylinder on fire does the cost of buying flash back arrestors seem cheap !
Yes you should have both - the check valves on the torch really only prevent intermixing of gasses due to large pressure differentials & help prevent hose damage due to high pressure shocks caused by a flash back - the flash back arrestors prevent a flame traveling back up the pipe to the regulator & causing damage or even getting to cause burn back into the cylinder - the better ones will shut off the gas even after a small " pop " until reset - only after seeing a cylinder on fire does the cost of buying flash back arrestors seem cheap !
I would call the manufacturer and see what they recommend. Some manufacturers specifically say not to use both because these devices cause flow restrictions which can increase your risk of a backfire or flashback.
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